| Impedance Measurement: |
| Accuracy | ± 1% of reading (when the test current is > 500µ / impedance in Ohms and > 30 mA) |
| Range | 0 to 100 Ohms |
| Digital Current Measurement | Accuracy | ± 1% of reading ± 4 mA |
| Range | 0 to 144 Amps rms |
| Bar Graph Current Measurement | Accuracy: | ± 1% of reading ± 4 mA at transition points (every 2.5 Arms) |
| Range | 2.5 to 77.5 Amps rms (0 to 2.5 Arms implied) |
| Digital Timer | Accuracy | ± .1% (Digital Timer and Audio / Visual Alerts applicable to Model 309 or, if server driven, Model 308) |
| Range | 1 second to 59 minutes, 59 seconds (extended times possible under server software) |
| Audio / Visual Alerts | When enabled, sounds and flashes when any user specified test current or impedance limit is violated. |
| Accuracy: Logically detected. The accuracy therefore exactly matches the accuracy of associated measurements. |
| Operating Duty Cycle | Continuous to test currents of 35 Amps |
| Derate linearly to 50% duty cycle at 60 Amps |
| Maximum Cycle Period: 35 to 60 Amps: 4 Minutes |
| Maximum allowed common mode voltage to ground: 50 Vrms, 71 Vpeak or dc |
| Maximum normal mode open circuit probe source voltage (at 132 Vrms line voltage) | 8.6 Vrms, 12.1 Vpeak |
| Input Power Requirements | 90 to 132 Volts rms |
| 48 to 66 Hertz sine wave |
| Maximum Power: 396 Watts (3.0 Arms at 132 Vrms) |
| Check Resistor | Resistance: 100 milliohms ± 1% |
| Maximum continuous current: 17.5 Amps |